615191 - Multipart form upload should add content-length for binary data

Status: RESOLVED DUPLICATE of bug 236084

(Firefox :: General, enhancement)

Description

[Wilfried Goesgens]

User-Agent:       Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.1.15) Gecko/20101028 Iceweasel/3.5.15 (like Firefox/3.5.15)
Build Identifier: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.1.15) Gecko/20101028 Iceweasel/3.5.15 (like Firefox/3.5.15)

when posting of the type multipart/form-data the general mime-header for content-length is set, but inside of the posted mime document none is set.
In case of file upload setting the content-length for that sub-mime container would ease server side parsing.

Reproducible: Always

Steps to Reproduce:
1.sniff your http connection using wireshark/tcpdump
2.choose some web application where you can upload binary data with some text in other parts of a form 
3.press upload
Actual Results:  
content-length header is set for the total post-document, but for none of the sub-mimecontainers; thats not bad for three lines of text, but to search Megabytes of Zipped data for the next mime-boundary wastes precious server cpu time. 

Expected Results:  
content-length headers should be set for binary parts of a multipart form upload; firefox can stat() the file to get the size while creating the mime container.